Question

Please i need help with this rn

Answer 1

Hi there!

$\large\boxed{f(9) = 12}$

Evaluating f(x) at x = 9 means we must use the piecewise function where x = 9 is included.

f(x) = 12 includes 9 because a "≤" is inclusive of the interval. Thus:

f(9) = 12